Hoshizaki American, Inc. TempGuard User manual

Hoshizaki

“A Superior Degree

of Reliability”

www.hoshizaki.com

Models

TempGuard

Commercial Refrigerators & Freezers

Hoshizaki America, Inc.

Number: 73077

Issued: 3-8-1999

Revised: 2-21-2007

SERVICE MANUAL

®

2

IMPORTANT

Only qualiﬁed service technicians should attempt to service or maintain this

unit. No such service or maintenance should be undertaken until the technician

has thoroughly read this Service Manual.

HOSHIZAKI provides this manual primarily to assist qualiﬁed service technicians in the

service and maintenance of the unit.

Should the reader have any questions or concerns which have not been satisfactorily

addressed, please call, write or send an e-mail message to the HOSHIZAKI Technical

Support Department for assistance.

HOSHIZAKI AMERICA, INC.

618 Highway 74 South

Peachtree City, GA 30269

Attn: HOSHIZAKI Technical Support Department

Phone: 1-800-233-1940 Technical Service

(770) 487-2331

Fax: 1-800-843-1056

(770) 487-3360

E-mail: techsuppor[email protected]

Web Site: www.hoshizaki.com

NOTE: To expedite assistance, all correspondence/communication MUST include the

following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem

3

Please review this manual. It should be read carefully before the unit is serviced or

maintenance operations are performed. Only qualiﬁed service technicians should service

and maintain the unit. This manual should be made available to the technician prior to

service or maintenance.

CONTENTS

I. Speciﬁcations ...................................................................................................................... 5

A. Nameplate Ratings........................................................................................................ 5

B. Dimensions ................................................................................................................... 6

1. Notes for All Units .................................................................................................... 6

2. RH1-SSB(-HD), FH1-SSB(-HD), RFH1-SSB-HD, RH1-SSB-GD ............................ 7

3. RH2-SSB(-HD), FH2-SSB(-HD), RFH2-SSB(-HD), RH2-SSB-GD ......................... 8

4. RH3-SSB(-HD), FH3-SSB(-HD), RFH3-SSB(-HD), RH3-SSB-GD ......................... 9

5. PTR1SSB-xxxx, PTR1-SSB01-10 ......................................................................... 10

II. General Information ......................................................................................................... 11

A. Sequence of Operation and Timing Charts ................................................................. 11

1. Refrigerator and Refrigerator Side of Dual Temp Models ...................................... 11

2. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier .....

13

3. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later ........ 15

4. Freezer Side of RFH1-SSB-HD ............................................................................. 17

B. Display Board .............................................................................................................. 19

C. Control Board .............................................................................................................. 20

1. Location ................................................................................................................. 20

2. Control Board Layout .............................................................................................

21

D. Settings and Diagnostics ............................................................................................. 22

1. Guarded Access Menu ......................................................................................... 22

a) Temperature Setpoint ...................................................................................... 22

b) Defrost Frequency ......................................................................................... 22

c) Temperature Display Scale (°F or °C) .............................................................. 23

2. Diagnostics Menu ................................................................................................. 24

E. Alarm Signals and Countermeasures ......................................................................... 25

F. Compressor Protector .................................................................................................. 26

G. Perimeter Frame Heater ............................................................................................. 26

H. Glass Door Heater ...................................................................................................... 26

III. Service Diagnosis ........................................................................................................... 27

A. Diagnosis Chart .......................................................................................................... 27

B. Thermistor Check ........................................................................................................ 30

IV. Removal and Replacement of Components ................................................................... 31

A. Service for Refrigerant Lines ...................................................................................... 31

1. Refrigerant Recovery ............................................................................................. 31

2. Brazing .................................................................................................................. 31

3. Evacuation and Recharge ..................................................................................... 32

B. Removal and Replacement of Compressor ................................................................ 33

C. Removal and Replacement of Expansion Valve ......................................................... 34

D. Removal and Replacement of Evaporator .................................................................. 35

E. Removal and Replacement of Evaporator Fan Shroud Assembly .............................. 36

F. Removal and Replacement of Heat Shield on FH2-SSB(-HD) .................................... 37

G. Removal and Replacement of Door Gasket ............................................................... 37

4

H. Removal and Replacement of Door Closure Spring ................................................... 38

I. Removal and Replacement of Control Board ............................................................... 39

J. Door Re-Hinging (except glass doors) ......................................................................... 40

V. Cleaning Instructions ....................................................................................................... 41

VI. Wiring Diagrams ............................................................................................................. 42

A1. RH1-SSB(-HD) (auxiliary code L5 and earlier) ......................................................... 42

A2. RH1-SSB(-HD) (auxiliary code M5 and later) ...........................................................

43

B1. RH2-SSB(-HD) (auxiliary code L5 and earlier) .........................................................

44

B2. RH2-SSB(-HD) (auxiliary code M5 and later) ........................................................... 45

C1. RH3-SSB(-HD) (auxiliary code L5 and earlier) ......................................................... 46

C2. RH3-SSB(-HD) (auxiliary code M5 and later) ........................................................... 47

D1. RH1-SSB-GD (auxiliary code N6 and earlier) ........................................................... 48

D2. RH1-SSB-GD (auxiliary code P5 and later) ..............................................................

49

E1. RH2-SSB-GD (auxiliary code N6 and earlier) ........................................................... 50

E2. RH2-SSB-GD (auxiliary code P5 and later) .............................................................. 51

F1. RH3-SSB-GD (auxiliary code K0) ............................................................................. 52

F2. RH3-SSB-GD (auxiliary code N6 and later) .............................................................. 53

G1. FH1-SSB(-HD) (auxiliary code P5 and earlier) ......................................................... 54

G2. FH1-SSB(-HD) (auxiliary code P6 and later) ............................................................ 55

H1. FH2-SSB(-HD) (auxiliary code P5 and earlier) ......................................................... 56

H2. FH2-SSB(-HD) (auxiliary code P6 and later) ............................................................ 57

I. RFH1-SSB-HD ............................................................................................................. 58

1. Refrigerator ........................................................................................................... 58

2a. Freezer (auxiliary code P5 and earlier) ............................................................... 59

2b. Freezer (auxiliary code Q5 and later) .................................................................. 60

J. RFH2-SSB(-HD) .......................................................................................................... 61

K. RFH3-SSB(-HD).......................................................................................................... 61

L. RIR2-SSB51-02 ........................................................................................................... 62

M. PTR1SSB-xxxx, PTR1-SSB01-10 .............................................................................. 63

5

I. Speciﬁcations

A. Nameplate Ratings

Design Pressure (PSIG) Refrigerant

AC Supply Voltage Amperes HI LO R-404A

RH1-SSB / RH1-SSB-HD 115/60/1 7.0 450 200 12.2 OZ

RH1-SSB-GD 115/60/1 10.7 450 200 16.1 OZ

FH1-SSB / FH1-SSB-HD 115/60/1 12.0 450 250 15.2 OZ

RH2-SSB / RH2-SSB-HD

115/60/1 10.0 450 200 18.2 OZ

RH2-SSB-GD

115/60/1 11.8 400 200 21.5 OZ

FH2-SSB / FH2-SSB-HD

115/60/1 15.5 450 250 20.1 OZ

RH3-SSB / RH3-SSB-HD 115/60/1 13.0 450 200 23.2 OZ

RH3-SSB-GD 115/60/1 15.5 450 250 31.4 OZ

RIR2-SSB51-02

115/60/1 11.0 450 200 18.2 OZ

PTR1SSB-xxxx / PTR1-SSB01-10 115/60/1 12.0 450 250 15.5 OZ

Design Pressure (PSIG) Refrigerant

AC Supply

Voltage Amperes

Refrigerator Freezer R-404A

HI LO HI LO Refrigerator Freezer

RFH2-SSB / RFH2-SSB-HD

115/60/1 19 450 200 450 250 12.2 OZ 15.2 OZ

RFH3-SSB / RFH3-SSB-HD 115/60/1 22 450 200 450 250 18.2 OZ 15.2 OZ

RFH1-SSB-HD 115/60/1 16.0 450 250 450 250 9.5 OZ 12.0 OZ

See the nameplate for electrical and refrigeration speciﬁcations. The nameplate is located

on the right side wall of the cabinet interior.

Note: We reserve the right to make changes in speciﬁcations and design without prior

notice.

6

B. Dimensions

1. Notes for All Units

a) Units: mm (in.)

b) Legs have 25.4 mm (1 in.) height adjustment

Door Opening Total Refrigerated

Volume ft

3

Total Shelf Space ft

2

Width

mm (in.)

Height

mm (in.)

RH1-SSB / FH1-SSB 554.8 (21.8) 1507(59.3) 22.3 11.5

RH1-SSB-GD 554.8 (21.8) 1507(59.3) 22.3

RH1-SSB-HD / FH1-SSB-HD 554.8 (21.8) 681.7(26.8) 22.3

RH2-SSB / FH2-SSB 554.8 (21.8)

1507(59.3) 48.3 25.3

RH2-SSB-GD / RIR2-SSB51-02 554.8 (21.8)

1507(59.3) 48.3

RH2-SSB-HD / FH2-SSB-HD 554.8 (21.8) 681.7(26.8)

48.3

RH3-SSB / FH3-SSB 554.8 (21.8) 1507(59.3) 73.7 39

RH3-SSB-GD 554.8 (21.8) 1507(59.3) 73.7

RH3-SSB-HD / FH3-SSB-HD 554.8 (21.8) 681.7(26.8) 73.7

Refrigerator Freezer Refrigerator Freezer

RFH2-SSB 554.8 (21.8)

1507(59.3) 22.3 22.3 11.5 11.5

RFH2-SSB-HD 554.8 (21.8) 681.7(26.8) 22.3 22.3

11.5 11.5

RFH3-SSB 554.8 (21.8) 1507(59.3) 48.3 22.3 25.3 11.5

RFH3-SSB-HD 554.8 (21.8) 681.7(26.8) 48.3 22.3 25.3 11.5

RFH1-SSB-HD 554.8 (21.8) 681.7 (26.8) 9.1 10.5 11.5 (total)

Depth with

Doors Open

Door Opening Total Refrigerated

Volume ft

3

Total Shelf Space ft

2

Width

mm (in.)

Height

mm (in.)

PTR1SSB-FSFS 2,177 (85.9) 554.8 (21.8) 1507(59.3) 23.8 13.6

PTR1SSB-FGFG 2,146.2 (84.7)

PTR1SSB-HSHS 2,177 (85.9) 554.8 (21.8) 681.7 (26.8)

PTR1SSB-HGHG 2,146.2 (84.7)

PTR1SSB-HGHS /

PTR1-SSB01-10

(Half glass and half solid

door combo)

2,161.6 (85.3)

See the nameplate for electrical and refrigeration speciﬁcations. The nameplate is located

on the right side wall of the cabinet interior.

Note: We reserve the right to make changes in speciﬁcations and design without prior

notice.

7

2. RH1-SSB(-HD), FH1-SSB(-HD), RFH1-SSB-HD, RH1-SSB-GD

mm (in.)

8

3. RH2-SSB(-HD), FH2-SSB(-HD), RFH2-SSB(-HD), RH2-SSB-GD

mm (in.)

9

4. RH3-SSB(-HD), FH3-SSB(-HD), RFH3-SSB(-HD), RH3-SSB-GD

mm (in.)

10

5. PTR1SSB-xxxx, PTR1-SSB01-10

mm (in.)

11

POWER ON

Board Self Check

Display reads "r_##"

(## is board revision)

1. Frame heaters on

2. Evaporator fan on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

Cycle Off (Cut-out

temperature reached)

[Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

Cycle On (Cut-on

temperature reached)

[Minimum 2.5 minutes]

1. Compressor on

2. Condenser fan on

If evaporator temperature

reaches 13°F (8°F for Pass Thru),

unit initiates defrost.

1. Compressor off

(Note: Condenser fan and

evaporator fan are on.)

Evaporator temperature

reaches 40°F, defrost

terminated

1. Compressor on

2. Condenser fan on

Normal cycling continues

Note: The start circuit of the compressor is timed such that at power-up and during

any compressor off time, there will be at least a 2 1/2 minute delay before the

compressor will start. The only exception is when the overload activates and

deactivates. The compressor has a 2 1/2 minute minimum run time during every

run cycle.

II. General Information

A. Sequence of Operation and Timing Charts

1. Refrigerator and Refrigerator Side of Dual Temp Models

a) Sequence of Operation

12

b) Timing Chart

For refrigerator, and refrigerator side of Dual Temp models.

13

Note: The start circuit of the compressor is timed such that at power-up and during

any compressor off time, there will be at least a 2 1/2 minute delay before the

compressor will start. The only exception is when the overload activates and

deactivates. The compressor has a 2 1/2 minute minimum run time during every

run cycle.

2. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier

a) Sequence of Operation

Cycle On (Cut-on

temperature reached)

[Minimum 2.5 minutes]

1. Compressor on

2. Condenser on

3. Evaporator on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

3. Evaporator fan start-up

POWER ON

Board Self Check

Display reads "r_##"

(## is board revision)

Frame heaters on

Cycle Off (Cut-out

temperature reached)

[Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

3. Evaporator fan off

Defrost Start

Preprogrammed time interval

1. Compressor off

2. Evaporator fan off

3. Condenser fan off

4. Defrost heater on

5. "dEF" displayed

Defrost End

Defrost thermistor

reaches 100°F;

Defrost heater off

Five minutes after

defrost heater off

1. Compressor on

2. Condenser fan on

Evaporator temperature

reaches below 70°F

1. Evaporator fan on

Cabinet temperature reads

a value below 15°F above

the setpoint.

"dEF" no longer displayed,

cabinet temp. displayed.

Normal cycling continues

14

b) Timing Chart

For freezer (except freezer side of RFH1-SSB-HD) auxiliary code P5 and earlier.

15

Note: The start circuit of the compressor is timed such that at power-up and during

any compressor off time, there will be at least a 2 1/2 minute delay before the

compressor will start. The only exception is when the overload activates and

deactivates. The compressor has a 2 1/2 minute minimum run time during every

run cycle.

3. Freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later

a) Sequence of Operation

POWER ON

Board Self Check

Display reads "r_##"

(## is board revision)

1. Frame heaters on

2. Evaporator fan on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

Cycle Off (Cut-out

temperature reached)

[Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

Cycle On (Cut-on

temperature reached)

[Minimum 2.5 minutes]

1. Compressor on

2. Condenser fan on

Defrost Start

Preprogrammed time interval

1. Compressor off

2. Evaporator fan off

3. Condenser fan off

4. Defrost heater on

5. "dEF" displayed

Defrost End

Defrost thermistor

reaches 100°F;

Defrost heater off

Five minutes after

defrost heater off

1. Compressor on

2. Condenser fan on

Evaporator temperature

reaches below 70°F

1. Evaporator fan on

Cabinet temperature reads

a value below 15°F above

the setpoint.

"dEF" no longer displayed,

cabinet temp. displayed.

Normal cycling continues

16

b) Timing Chart

For freezer (except freezer side of RFH1-SSB-HD) auxiliary code P6 and later.

17

Note: The start circuit of the compressor is timed such that at power-up and during

any compressor off time, there will be at least a 2 1/2 minute delay before the

compressor will start. The only exception is when the overload activates and

deactivates. The compressor has a 2 1/2 minute minimum run time during every

run cycle.

4. Freezer Side of RFH1-SSB-HD

a) Sequence of Operation

POWER ON

Board Self Check

Display reads "r_##"

(## is board revision);

Frame heaters on

2.5 minute delay

1. Compressor start-up

2. Condenser fan start-up

3. Evaporator fan start-up

Cycle Off (Cut-out

temperature reached)

[Minimum 2.5 minutes]

1. Compressor off

2. Condenser fan off

Cycle On (Cut-on

temperature reached)

[Minimum 2.5 minutes]

1. Compressor on

2. Condenser fan on

Defrost Start

Preprogrammed time interval

1. Compressor off

2. Evaporator fan off

3. Condenser fan off

4. Defrost heater on

5. "dEF" displayed

Defrost End

Defrost thermistor

reaches 100°F;

Defrost heater off

Five minutes after

defrost heater off

1. Compressor on

2. Condenser fan on

Evaporator temperature

reaches below 70°F

1. Evaporator fan on

Cabinet temperature reads

a value below 15°F above

the setpoint.

"dEF" no longer displayed,

cabinet temp. displayed.

Normal cycling continues

18

b) Timing Chart

For freezer side of RFH1-SSB-HD.

19

Evercheck Display Board

B. Display Board

The display board is located on the right hand side of the control panel between the top

of the door and the front panel. From this area, information regarding the functioning

of the unit can be obtained. When the unit is turned on, the ﬁrst display reads "r_##",

where "##" indicates the board revision level. From the display board, various electronic

controls and functions can also be adjusted. See "D. Settings and Diagnostics."

20

C. Control Board

• A HOSHIZAKI exclusive solid-state control is employed in all Hoshizaki refrigerators

and freezers.

• All models are pretested and factory-adjusted.

CAUTION

1. Fragile, handle very carefully.

2. The control board contains integrated circuits, which are susceptible to failure

due to static discharge. It is especially important to touch the metal part of

the unit before handling or replacing the board.

3. To prevent damage to the board, do not touch the electronic devices on the

board or the back of the board.

4. Do not ﬁx the electronic devices or parts on the board in the ﬁeld. Always

replace the whole board assembly if it goes bad.

5. Do not short out power supply to test for voltage.

6. Keep the thermistors, clogged ﬁlter leads, door switch leads, pressure switch

leads and ribbon cable at least 1 1/2" away from high voltage leads (AC 100

volts or more) to protect against electrical noise.

1. Location

The control box, the control panel and an error code label are located behind the front

panel. There are two front panel designs. If the front panel swings up when pulled out,

swing the panel up and allow both panel hinges to catch securely on both sides of

the side panel frame (one on each side). Otherwise, remove the panel by lifting it up

approximately one-half inch, then pulling it forward.

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Hoshizaki American, Inc. TempGuard User manual

Hoshizaki American, Inc. TempGuard User manual

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